2 * Copyright 2015 Martin Peres
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Martin Peres
26 #include <subdev/bios.h>
27 #include <subdev/bios/extdev.h>
28 #include <subdev/bios/iccsense.h>
29 #include <subdev/i2c.h>
32 nvkm_iccsense_validate_device(struct i2c_adapter
*i2c
, u8 addr
,
33 enum nvbios_extdev_type type
)
36 case NVBIOS_EXTDEV_INA209
:
37 case NVBIOS_EXTDEV_INA219
:
38 return nv_rd16i2cr(i2c
, addr
, 0x0) >= 0;
39 case NVBIOS_EXTDEV_INA3221
:
40 return nv_rd16i2cr(i2c
, addr
, 0xff) == 0x3220 &&
41 nv_rd16i2cr(i2c
, addr
, 0xfe) == 0x5449;
48 nvkm_iccsense_poll_lane(struct i2c_adapter
*i2c
, u8 addr
, u8 shunt_reg
,
49 u8 shunt_shift
, u8 bus_reg
, u8 bus_shift
, u8 shunt
,
52 int vshunt
= nv_rd16i2cr(i2c
, addr
, shunt_reg
);
53 int vbus
= nv_rd16i2cr(i2c
, addr
, bus_reg
);
55 if (vshunt
< 0 || vbus
< 0)
58 vshunt
>>= shunt_shift
;
61 return vbus
* vshunt
* lsb
/ shunt
;
65 nvkm_iccsense_ina2x9_read(struct nvkm_iccsense
*iccsense
,
66 struct nvkm_iccsense_rail
*rail
,
67 u8 shunt_reg
, u8 bus_reg
)
69 return nvkm_iccsense_poll_lane(rail
->sensor
->i2c
, rail
->sensor
->addr
,
70 shunt_reg
, 0, bus_reg
, 3, rail
->mohm
,
75 nvkm_iccsense_ina209_read(struct nvkm_iccsense
*iccsense
,
76 struct nvkm_iccsense_rail
*rail
)
78 return nvkm_iccsense_ina2x9_read(iccsense
, rail
, 3, 4);
82 nvkm_iccsense_ina219_read(struct nvkm_iccsense
*iccsense
,
83 struct nvkm_iccsense_rail
*rail
)
85 return nvkm_iccsense_ina2x9_read(iccsense
, rail
, 1, 2);
89 nvkm_iccsense_ina3221_read(struct nvkm_iccsense
*iccsense
,
90 struct nvkm_iccsense_rail
*rail
)
92 return nvkm_iccsense_poll_lane(rail
->sensor
->i2c
, rail
->sensor
->addr
,
93 1 + (rail
->idx
* 2), 3,
94 2 + (rail
->idx
* 2), 3, rail
->mohm
,
99 nvkm_iccsense_read_all(struct nvkm_iccsense
*iccsense
)
102 struct nvkm_iccsense_rail
*rail
;
107 list_for_each_entry(rail
, &iccsense
->rails
, head
) {
112 res
= rail
->read(iccsense
, rail
);
121 nvkm_iccsense_dtor(struct nvkm_subdev
*subdev
)
123 struct nvkm_iccsense
*iccsense
= nvkm_iccsense(subdev
);
124 struct nvkm_iccsense_sensor
*sensor
, *tmps
;
125 struct nvkm_iccsense_rail
*rail
, *tmpr
;
127 list_for_each_entry_safe(sensor
, tmps
, &iccsense
->sensors
, head
) {
128 list_del(&sensor
->head
);
131 list_for_each_entry_safe(rail
, tmpr
, &iccsense
->rails
, head
) {
132 list_del(&rail
->head
);
139 static struct nvkm_iccsense_sensor
*
140 nvkm_iccsense_create_sensor(struct nvkm_iccsense
*iccsense
, u8 id
)
143 struct nvkm_subdev
*subdev
= &iccsense
->subdev
;
144 struct nvkm_bios
*bios
= subdev
->device
->bios
;
145 struct nvkm_i2c
*i2c
= subdev
->device
->i2c
;
146 struct nvbios_extdev_func extdev
;
147 struct nvkm_i2c_bus
*i2c_bus
;
148 struct nvkm_iccsense_sensor
*sensor
;
151 if (!i2c
|| !bios
|| nvbios_extdev_parse(bios
, id
, &extdev
))
154 if (extdev
.type
== 0xff)
157 if (extdev
.type
!= NVBIOS_EXTDEV_INA209
&&
158 extdev
.type
!= NVBIOS_EXTDEV_INA219
&&
159 extdev
.type
!= NVBIOS_EXTDEV_INA3221
) {
160 iccsense
->data_valid
= false;
161 nvkm_error(subdev
, "Unknown sensor type %x, power reading "
162 "disabled\n", extdev
.type
);
167 i2c_bus
= nvkm_i2c_bus_find(i2c
, NVKM_I2C_BUS_SEC
);
169 i2c_bus
= nvkm_i2c_bus_find(i2c
, NVKM_I2C_BUS_PRI
);
173 addr
= extdev
.addr
>> 1;
174 if (!nvkm_iccsense_validate_device(&i2c_bus
->i2c
, addr
,
176 iccsense
->data_valid
= false;
177 nvkm_warn(subdev
, "found invalid sensor id: %i, power reading"
178 "might be invalid\n", id
);
182 sensor
= kmalloc(sizeof(*sensor
), GFP_KERNEL
);
186 list_add_tail(&sensor
->head
, &iccsense
->sensors
);
188 sensor
->type
= extdev
.type
;
189 sensor
->i2c
= &i2c_bus
->i2c
;
191 sensor
->rail_mask
= 0x0;
195 static struct nvkm_iccsense_sensor
*
196 nvkm_iccsense_get_sensor(struct nvkm_iccsense
*iccsense
, u8 id
)
198 struct nvkm_iccsense_sensor
*sensor
;
199 list_for_each_entry(sensor
, &iccsense
->sensors
, head
) {
200 if (sensor
->id
== id
)
203 return nvkm_iccsense_create_sensor(iccsense
, id
);
207 nvkm_iccsense_oneinit(struct nvkm_subdev
*subdev
)
209 struct nvkm_iccsense
*iccsense
= nvkm_iccsense(subdev
);
210 struct nvkm_bios
*bios
= subdev
->device
->bios
;
211 struct nvbios_iccsense stbl
;
214 if (!bios
|| nvbios_iccsense_parse(bios
, &stbl
) || !stbl
.nr_entry
)
217 iccsense
->data_valid
= true;
218 for (i
= 0; i
< stbl
.nr_entry
; ++i
) {
219 struct pwr_rail_t
*r
= &stbl
.rail
[i
];
220 struct nvkm_iccsense_rail
*rail
;
221 struct nvkm_iccsense_sensor
*sensor
;
223 if (!r
->mode
|| r
->resistor_mohm
== 0)
226 sensor
= nvkm_iccsense_get_sensor(iccsense
, r
->extdev_id
);
230 rail
= kmalloc(sizeof(*rail
), GFP_KERNEL
);
234 switch (sensor
->type
) {
235 case NVBIOS_EXTDEV_INA209
:
238 rail
->read
= nvkm_iccsense_ina209_read
;
240 case NVBIOS_EXTDEV_INA219
:
243 rail
->read
= nvkm_iccsense_ina219_read
;
245 case NVBIOS_EXTDEV_INA3221
:
248 rail
->read
= nvkm_iccsense_ina3221_read
;
254 sensor
->rail_mask
|= 1 << r
->rail
;
255 rail
->sensor
= sensor
;
257 rail
->mohm
= r
->resistor_mohm
;
258 list_add_tail(&rail
->head
, &iccsense
->rails
);
263 struct nvkm_subdev_func iccsense_func
= {
264 .oneinit
= nvkm_iccsense_oneinit
,
265 .dtor
= nvkm_iccsense_dtor
,
269 nvkm_iccsense_ctor(struct nvkm_device
*device
, int index
,
270 struct nvkm_iccsense
*iccsense
)
272 nvkm_subdev_ctor(&iccsense_func
, device
, index
, 0, &iccsense
->subdev
);
276 nvkm_iccsense_new_(struct nvkm_device
*device
, int index
,
277 struct nvkm_iccsense
**iccsense
)
279 if (!(*iccsense
= kzalloc(sizeof(**iccsense
), GFP_KERNEL
)))
281 INIT_LIST_HEAD(&(*iccsense
)->sensors
);
282 INIT_LIST_HEAD(&(*iccsense
)->rails
);
283 nvkm_iccsense_ctor(device
, index
, *iccsense
);